What status would you give to the source that leads you to your beloved one?
Vaheguru is our ultimate aim and Guru Sahib is our source or way to Vaheguru.
In order to meet Vahegure we need Guru Sahib so that we may get Naam from Him.
Now the difficulty is that one can't just get Naam directly. We need to Chhak Amrit to get Naam.
In order to qualify for Naam, we need to be able to get into Amrit Sinchaar Samagam and get Naam.
In order to get into Amrit Sinchaar Samagam, we have to adopt Rehit first; we have to wear 5 Kakaars, Baana and go to the Darbar of Punj Pyare.
Punj Pyare during the initial Peshi tell the Seeker the Rehit of Khalsa briefly and only when the Seeker agrees to keep Rehit, he is accepted as a candidate for Amrit and Naam.
Without keeping Rehit it is impossible to get Naam and without Naam it is impossible to attain Vaheguru. This shows the importance of Rehit. Rehit is to Naam what Naam is to Vaheguru. Naam is the source to reach Vaheguru and Rehit is the source to attain Naam. Guru Sahib bestows both Rehit and Naam.
Another name for Rehit is Hukam. Guru Sahib's Hukam is Rehit for Khalsa.
So we can't deny the importance of Rehit and can't ever get relaxed on Rehit. The Rehitnamas are the greatest source of Rehit and for this reason, they are of utmost importance. Their status in Khalsa Panth is same as the status of Hadees in Islam.